Plans for the New Tube for London (NTfL) project that will provide 250 new trains for the Bakerloo, Central, Piccadilly and Waterloo & City lines have been delayed, RAIL understands.

The Invitation To Tender was due to be issued at the end of February, but has now been delayed indefinitely according to industry sources. This is believed to be linked to the awaited signing of the replacement Automatic Train Control contract on the Sub-Surface lines.

The delay relates to funding and scoping the project, which will influence the completion date.